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Diffstat (limited to 'third_party/libpng/arm/filter_neon_intrinsics.c')
-rw-r--r--third_party/libpng/arm/filter_neon_intrinsics.c387
1 files changed, 0 insertions, 387 deletions
diff --git a/third_party/libpng/arm/filter_neon_intrinsics.c b/third_party/libpng/arm/filter_neon_intrinsics.c
deleted file mode 100644
index 22923b4b4f..0000000000
--- a/third_party/libpng/arm/filter_neon_intrinsics.c
+++ /dev/null
@@ -1,387 +0,0 @@
-
-/* filter_neon_intrinsics.c - NEON optimised filter functions
- *
- * Copyright (c) 2014,2016 Glenn Randers-Pehrson
- * Written by James Yu <james.yu at linaro.org>, October 2013.
- * Based on filter_neon.S, written by Mans Rullgard, 2011.
- *
- * Last changed in libpng 1.6.22 [(PENDING RELEASE)]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "../pngpriv.h"
-
-#ifdef PNG_READ_SUPPORTED
-
-/* This code requires -mfpu=neon on the command line: */
-#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */
-
-#include <arm_neon.h>
-
-/* libpng row pointers are not necessarily aligned to any particular boundary,
- * however this code will only work with appropriate alignment. arm/arm_init.c
- * checks for this (and will not compile unless it is done). This code uses
- * variants of png_aligncast to avoid compiler warnings.
- */
-#define png_ptr(type,pointer) png_aligncast(type *,pointer)
-#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer)
-
-/* The following relies on a variable 'temp_pointer' being declared with type
- * 'type'. This is written this way just to hide the GCC strict aliasing
- * warning; note that the code is safe because there never is an alias between
- * the input and output pointers.
- */
-#define png_ldr(type,pointer)\
- (temp_pointer = png_ptr(type,pointer), *temp_pointer)
-
-#if PNG_ARM_NEON_OPT > 0
-
-void
-png_read_filter_row_up_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_bytep rp_stop = row + row_info->rowbytes;
- png_const_bytep pp = prev_row;
-
- png_debug(1, "in png_read_filter_row_up_neon");
-
- for (; rp < rp_stop; rp += 16, pp += 16)
- {
- uint8x16_t qrp, qpp;
-
- qrp = vld1q_u8(rp);
- qpp = vld1q_u8(pp);
- qrp = vaddq_u8(qrp, qpp);
- vst1q_u8(rp, qrp);
- }
-}
-
-void
-png_read_filter_row_sub3_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_bytep rp_stop = row + row_info->rowbytes;
-
- uint8x16_t vtmp = vld1q_u8(rp);
- uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp);
- uint8x8x2_t vrp = *vrpt;
-
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- png_debug(1, "in png_read_filter_row_sub3_neon");
-
- for (; rp < rp_stop;)
- {
- uint8x8_t vtmp1, vtmp2;
- uint32x2_t *temp_pointer;
-
- vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3);
- vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]);
- vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6);
- vdest.val[1] = vadd_u8(vdest.val[0], vtmp1);
-
- vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1);
- vdest.val[2] = vadd_u8(vdest.val[1], vtmp2);
- vdest.val[3] = vadd_u8(vdest.val[2], vtmp1);
-
- vtmp = vld1q_u8(rp + 12);
- vrpt = png_ptr(uint8x8x2_t, &vtmp);
- vrp = *vrpt;
-
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0);
- rp += 3;
- }
-
- PNG_UNUSED(prev_row)
-}
-
-void
-png_read_filter_row_sub4_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_bytep rp_stop = row + row_info->rowbytes;
-
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- png_debug(1, "in png_read_filter_row_sub4_neon");
-
- for (; rp < rp_stop; rp += 16)
- {
- uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp));
- uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp);
- uint8x8x4_t vrp = *vrpt;
- uint32x2x4_t *temp_pointer;
-
- vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]);
- vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]);
- vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]);
- vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]);
- vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0);
- }
-
- PNG_UNUSED(prev_row)
-}
-
-void
-png_read_filter_row_avg3_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep rp_stop = row + row_info->rowbytes;
-
- uint8x16_t vtmp;
- uint8x8x2_t *vrpt;
- uint8x8x2_t vrp;
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- vtmp = vld1q_u8(rp);
- vrpt = png_ptr(uint8x8x2_t,&vtmp);
- vrp = *vrpt;
-
- png_debug(1, "in png_read_filter_row_avg3_neon");
-
- for (; rp < rp_stop; pp += 12)
- {
- uint8x8_t vtmp1, vtmp2, vtmp3;
-
- uint8x8x2_t *vppt;
- uint8x8x2_t vpp;
-
- uint32x2_t *temp_pointer;
-
- vtmp = vld1q_u8(pp);
- vppt = png_ptr(uint8x8x2_t,&vtmp);
- vpp = *vppt;
-
- vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3);
- vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]);
- vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]);
-
- vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3);
- vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6);
- vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2);
- vdest.val[1] = vadd_u8(vdest.val[1], vtmp1);
-
- vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6);
- vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1);
-
- vtmp = vld1q_u8(rp + 12);
- vrpt = png_ptr(uint8x8x2_t,&vtmp);
- vrp = *vrpt;
-
- vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2);
- vdest.val[2] = vadd_u8(vdest.val[2], vtmp3);
-
- vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1);
-
- vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2);
- vdest.val[3] = vadd_u8(vdest.val[3], vtmp1);
-
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0);
- rp += 3;
- }
-}
-
-void
-png_read_filter_row_avg4_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_bytep rp_stop = row + row_info->rowbytes;
- png_const_bytep pp = prev_row;
-
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- png_debug(1, "in png_read_filter_row_avg4_neon");
-
- for (; rp < rp_stop; rp += 16, pp += 16)
- {
- uint32x2x4_t vtmp;
- uint8x8x4_t *vrpt, *vppt;
- uint8x8x4_t vrp, vpp;
- uint32x2x4_t *temp_pointer;
-
- vtmp = vld4_u32(png_ptr(uint32_t,rp));
- vrpt = png_ptr(uint8x8x4_t,&vtmp);
- vrp = *vrpt;
- vtmp = vld4_u32(png_ptrc(uint32_t,pp));
- vppt = png_ptr(uint8x8x4_t,&vtmp);
- vpp = *vppt;
-
- vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]);
- vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]);
- vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]);
- vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]);
- vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]);
- vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]);
- vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]);
- vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]);
-
- vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0);
- }
-}
-
-static uint8x8_t
-paeth(uint8x8_t a, uint8x8_t b, uint8x8_t c)
-{
- uint8x8_t d, e;
- uint16x8_t p1, pa, pb, pc;
-
- p1 = vaddl_u8(a, b); /* a + b */
- pc = vaddl_u8(c, c); /* c * 2 */
- pa = vabdl_u8(b, c); /* pa */
- pb = vabdl_u8(a, c); /* pb */
- pc = vabdq_u16(p1, pc); /* pc */
-
- p1 = vcleq_u16(pa, pb); /* pa <= pb */
- pa = vcleq_u16(pa, pc); /* pa <= pc */
- pb = vcleq_u16(pb, pc); /* pb <= pc */
-
- p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */
-
- d = vmovn_u16(pb);
- e = vmovn_u16(p1);
-
- d = vbsl_u8(d, b, c);
- e = vbsl_u8(e, a, d);
-
- return e;
-}
-
-void
-png_read_filter_row_paeth3_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep rp_stop = row + row_info->rowbytes;
-
- uint8x16_t vtmp;
- uint8x8x2_t *vrpt;
- uint8x8x2_t vrp;
- uint8x8_t vlast = vdup_n_u8(0);
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- vtmp = vld1q_u8(rp);
- vrpt = png_ptr(uint8x8x2_t,&vtmp);
- vrp = *vrpt;
-
- png_debug(1, "in png_read_filter_row_paeth3_neon");
-
- for (; rp < rp_stop; pp += 12)
- {
- uint8x8x2_t *vppt;
- uint8x8x2_t vpp;
- uint8x8_t vtmp1, vtmp2, vtmp3;
- uint32x2_t *temp_pointer;
-
- vtmp = vld1q_u8(pp);
- vppt = png_ptr(uint8x8x2_t,&vtmp);
- vpp = *vppt;
-
- vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast);
- vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]);
-
- vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3);
- vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3);
- vdest.val[1] = paeth(vdest.val[0], vtmp2, vpp.val[0]);
- vdest.val[1] = vadd_u8(vdest.val[1], vtmp1);
-
- vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6);
- vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6);
- vdest.val[2] = paeth(vdest.val[1], vtmp3, vtmp2);
- vdest.val[2] = vadd_u8(vdest.val[2], vtmp1);
-
- vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1);
- vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1);
-
- vtmp = vld1q_u8(rp + 12);
- vrpt = png_ptr(uint8x8x2_t,&vtmp);
- vrp = *vrpt;
-
- vdest.val[3] = paeth(vdest.val[2], vtmp2, vtmp3);
- vdest.val[3] = vadd_u8(vdest.val[3], vtmp1);
-
- vlast = vtmp2;
-
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0);
- rp += 3;
- vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0);
- rp += 3;
- }
-}
-
-void
-png_read_filter_row_paeth4_neon(png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row)
-{
- png_bytep rp = row;
- png_bytep rp_stop = row + row_info->rowbytes;
- png_const_bytep pp = prev_row;
-
- uint8x8_t vlast = vdup_n_u8(0);
- uint8x8x4_t vdest;
- vdest.val[3] = vdup_n_u8(0);
-
- png_debug(1, "in png_read_filter_row_paeth4_neon");
-
- for (; rp < rp_stop; rp += 16, pp += 16)
- {
- uint32x2x4_t vtmp;
- uint8x8x4_t *vrpt, *vppt;
- uint8x8x4_t vrp, vpp;
- uint32x2x4_t *temp_pointer;
-
- vtmp = vld4_u32(png_ptr(uint32_t,rp));
- vrpt = png_ptr(uint8x8x4_t,&vtmp);
- vrp = *vrpt;
- vtmp = vld4_u32(png_ptrc(uint32_t,pp));
- vppt = png_ptr(uint8x8x4_t,&vtmp);
- vpp = *vppt;
-
- vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast);
- vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]);
- vdest.val[1] = paeth(vdest.val[0], vpp.val[1], vpp.val[0]);
- vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]);
- vdest.val[2] = paeth(vdest.val[1], vpp.val[2], vpp.val[1]);
- vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]);
- vdest.val[3] = paeth(vdest.val[2], vpp.val[3], vpp.val[2]);
- vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]);
-
- vlast = vpp.val[3];
-
- vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0);
- }
-}
-
-#endif /* PNG_ARM_NEON_OPT > 0 */
-#endif /* PNG_ARM_NEON_IMPLEMENTATION == 1 (intrinsics) */
-#endif /* READ */
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